diff options
Diffstat (limited to 'cpu/mpc8260/commproc.c')
| -rw-r--r-- | cpu/mpc8260/commproc.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/cpu/mpc8260/commproc.c b/cpu/mpc8260/commproc.c index c523ee4..72cceb3 100644 --- a/cpu/mpc8260/commproc.c +++ b/cpu/mpc8260/commproc.c @@ -111,9 +111,9 @@ m8260_cpm_hostalloc(uint size, uint align) * to port numbers). Documentation uses 1-based numbering. */ #define BRG_INT_CLK gd->brg_clk -#define BRG_UART_CLK ((BRG_INT_CLK + 15) / 16) +#define BRG_UART_CLK (BRG_INT_CLK / 16) -/* This function is used by UARTS, or anything else that uses a 16x +/* This function is used by UARTs, or anything else that uses a 16x * oversampled clock. */ void @@ -123,9 +123,10 @@ m8260_cpm_setbrg(uint brg, uint rate) volatile immap_t *immr = (immap_t *)CFG_IMMR; volatile uint *bp; + uint cd = BRG_UART_CLK / rate; - /* This is good enough to get SMCs running..... - */ + if ((BRG_UART_CLK % rate) < (rate / 2)) + cd--; if (brg < 4) { bp = (uint *)&immr->im_brgc1; } @@ -134,7 +135,7 @@ m8260_cpm_setbrg(uint brg, uint rate) brg -= 4; } bp += brg; - *bp = (((((BRG_UART_CLK+rate-1)/rate)-1)&0xfff)<<1)|CPM_BRG_EN; + *bp = (cd << 1) | CPM_BRG_EN; } /* This function is used to set high speed synchronous baud rate |